Could America’s secretive B-21 Raider already be flying?
Back in 1975, Lockheed’s legendary Skunk Works started tooling around with the Experimental Survivable Testbed (XST) program, also known as Project Harvey. Harvey soon led to the Hopeless Diamond, a shape developed using computers that experts agreed would offer the smallest radar return possible under their current computational restrictions. The Hopeless Diamond led to Have […]







